Medical Definition of Flu shot

Flu shot: The flu (influenza) vaccine is recommended annually (each year) for persons at high risk for serious complications from influenza virus infection.

This includes:

  • Everyone age 65 or more;
  • People with chronic diseases of the heart;
  • People with chronic diseases of the lung;
  • People with chronic diseases of the kidneys;
  • People with diabetes;
  • People with immunosuppression;
  • People with severe forms of anemia;
  • Residents of nursing homes and other chronic-care facilities;
  • Children and teenagers receiving long-term aspirin therapy (who may therefore be at risk for developing Reye syndrome after an influenza virus infection);
  • Women who will be in the second or third trimester of pregnancy during the influenza season;
  • People in close or frequent contact with anyone at high risk, including:
  • Physicians, nurses, and other personnel in both hospital and outpatient-care settings;
  • Employees of nursing homes and chronic-care facilities who have contact with patients or residents;
  • Health care professionals of home care to persons at high risk (for example, visiting nurses and volunteer workers); and
  • Household members (including children) of persons in high-risk groups.

People with a documented severe allergy to eggs should not receive influenza vaccine.

Last Editorial Review: 5/13/2016

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